Electrode holder



W. C. BEISWIN'GER AND R. F. MORGAN.

' ELECTRODE HOLDER. "AIPPLICATIQN ILED DEC 27,1921. 1,425,440. Pa ented Aug. 8, 1922.

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WILLIAM G. nnxswmenn. um 1101mm 1. 10mm, or WILKES-BARBIE, rmmm VANIA, nssrcnons TO w. n. mcnonsbn a 00., or WILKES-BARBIE, rnmws nvama, A conromvrron or rmmsnvnma;

mnc'rnonn 1101mm Specification of Letters -Patent. Patented Aug. 8, 1922.

1 Application filed December 27, 1921. Serial No. 524,930.

To all whom it may concern:

Be it known that We, WILLIAM C. BEIS- WINGER and Ronnn'r F. MORGAN, citizens of the United States, residing at Wilkes-Barre, in the county of Luzerne and State .of Pennsylvania, have invented certain new and use ful Improvements in Electrode Holders, of which the following is a specification.

This invention relates to holders for the electrodes used in the electric welding of metals; and it consists in the novel construc tion and combination of the parts hereinafter fully described and claimed which enable the electrode to be applied to good advantage and without danger of the holder being burned by being placed in contact with A the work.

In the drawings, Figure 1 is a longitudinal section through an electrode holder constructed according to this invention. Fig. 2 is an end view of the holder. Fig. 3 is a cross-section through the handle, taken on the line 3-3 in Fig. 1.

The handle 5 of the electrode holder is formed of insulating material, and it has a longitudinal chamber 6 for the clamping spring 18 at its middle part. A shoulder 8 is formed at the bottom of this chamber, and a passage 9 extends from it to one end of the handle, and this passage is smaller than the chamber in diameter. A shoulder 10 is formed at the other end of the chamber 6 by a cylindrical socket 12 which is a little larger in diameter than the chamber 6. A cylindrical metal guide tube 14 is inserted in the socket 12, and is firmly secured therein by a pin 15 of insulating material which is passed crosswise through holes in one side portion of the handle and a groove in one side of the tube. This pin is removable, and it prevents current from passing outwardly from the tube to the hand of the operator- A protecting casing 16 of insulating material is secured over the greater part of the tube 14 which is next to the handle.

A helical clamping spring 18 is arranged in the spring chamber 6, between the end of a metal rod 20 and the shoulder 8, and the rod 20 is slidable longitudinally in the guide tube 14. Slots 21 and 22 are formed in the sides of the guide tube and its casing, and 23 is a set-screw which is screwed into the rod 20, and which slides longitudinally in the slot 21 in the tube. This screw forms a stop which prevents the rod from revolving in the tube, and which limits its longitudinal movements. The spring 18 normally holds the rod 20 inits projected position.

A coupling plug 24 is secured in the inner end portion of the rod 20 by a screw 25, and the line wire 26 is soldered into this plug. The wire 26 is suitably insulated, and is passed through the passage 9 in the handle.

The electrode 28 is clamped in holes 29 and 30-formed respectively in the outer end portion of the rod 20, and the corresponding part of the tube 14. These holes are of various size, and are arranged crosswise and also diagonally, to suit electrodes of different size, and to suit difi'erent sorts of work. A diagonally arranged electrode is shown in Fig. 1.

A plate 30 of insulating material is secured to the outer end of the rod 20, by a screw 31', the head of which is countersunk into the plate 30. This plate may be of any approved form, and when rectangular, as shown, it prevents the holder from rolling when laid down. The plate 30' is considerably larger in diameter or width than the tube 14, and it prevents the tube 14 and the exposed part of the rod from being placed accidentally in contact with the work, and being burned by the current.

This plate also affords a means for releasing the electrode, by pressing the plate against any stationary object, so as to slide the rod 20 inwardly against the pressure of the spring 18. and thereby unclamp the electrode from the rod and its guide tube.

By placing the spring in the handle, the full length of the tube 14 is utilized as a guide for the rod 20, and the line wire plug is secured directly to the rod 20, which is found to be advantageous. The plate 30 of insulating material is also found to be a great. advantage, as it can be laid against the work to guide and steady the electrode.

The pin 15 can. be removed, when desirable, to disconnect the guide tube from the handle, and afford access to all the parts inside the handle which may need removal or repair.

What we claim is:

1. In an electrode holder, a supporting tube, a sprin -pressed rod slidable in the said tube, sai rod and tube being provided with means tor holding an electrode, and a plate of insulating material secured to the outer end of the said rod and affording a means for retractin it to free the electrode.

2. In an electro e holder, a supporting tube, a spring-pressed rod slidable in the said tube, said rod and tube being provided with means for holding an electrode, a plate of insulating material which overlaps the outer ends of the said rod and tube, and a screw having its head countersunk in the said plate and securing it against the outer end of the said rod.

3. In an electrode holder, a handle of insulating material, a guide secured thereto and having a slot in one side, a rod slidable longitudinally in the guide tube and projecting at the outer end thereof, said tube and rod being provided with means for holding an electrode, a stop secured to the rod and working in the saidslot and limit ing the movement of the rod whenits projecting end is pushed inwardly, and a protective casing of insulating material inclosing the handle end portion of the said tube.

4. In an electrode holder, a handle of insulating material provided with a chamber for a spring, a guide tube secured in the said handle, a rod slidable in the guide tube and projecting at each end thereof, said tube and rod being provided with means for holding an electrode, a clamping spring arranged between the bottom of the said chamber and the projecting inner end of the said rod, and-means for connecting a line wire to the said rod.

5. In an electrode holder, a removable handle of insulating material provided with a chamber for a spring, a guide tube slidable longitudinally in the handle at one end of the said chamber, a rod slidable in the guide tube, said tube and rod being provided with means for holding an electrode, a clamping spring arranged in the said chamber and bearing against the end of the said rod, means for connecting a line wire to the said rod inside the chamber, and a fastening pin inserted tangentially in a groove in the tube and holes in the handle and which normally locks the guide tube to the handle.

i V\ I In testimony whereof we afiix our signatures.

WVILLIAM C. BEISWINGER. ROBERT F. MORGAN. 

